LM385BPW-1-2 Equivalent & Substitute Parts

Part Overview

The LM385BPW-1-2 is a shunt voltage reference IC manufactured by Texas Instruments, designed for precision voltage reference applications in power management circuits. This Surface Mount device delivers a fixed 1.235V output with ±1% tolerance and operates across the 0°C to 70°C temperature range. The part is currently in Last Time Buy status, making identification of suitable alternatives essential for ongoing design support and procurement planning.

Substiute Parts

LM385BPW-1-2

Texas InstrumentsIn Stock: 1775LM385BPW-1-2 Datasheet

Current PartRFQ

LM385LPR-1-2

Texas InstrumentsIn Stock: 12949LM385LPR-1-2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM385BPW-1-2 is determined by the following critical parameters:

• Fixed output voltage of 1.235V
• Maximum output current of 20 mA
• Shunt reference topology
• Operating temperature range of 0°C to 70°C
• Temperature coefficient of 20ppm/°C typical
• Output noise specification of 60µVrms (10Hz to 10kHz)
• Cathode current of 15 µA
• ROHS3 compliance and REACH unaffected status

The LM385LPR-1-2 qualifies as a manufacturer-recommended substitute despite differences in packaging and tolerance specification. Both devices share identical electrical performance characteristics in voltage output, current ratings, temperature coefficient, and noise performance. The primary distinction lies in form factor and tolerance grade.

Parameter Comparison

Engineering Selection Recommendations

The LM385LPR-1-2 is designated as the manufacturer-recommended substitute for the LM385BPW-1-2. Both devices maintain identical electrical performance across all critical parameters including voltage output, current ratings, temperature coefficient, and noise characteristics. The substitute remains ROHS3 compliant and REACH unaffected, meeting the same regulatory requirements.

Selection between these parts depends on circuit implementation requirements. The LM385BPW-1-2 provides Surface Mount packaging suitable for high-density PCB layouts, while the LM385LPR-1-2 offers Through Hole packaging for applications requiring manual assembly or breadboard prototyping. The tolerance difference (±1% versus ±2%) should be evaluated against application precision requirements.

Given the Last Time Buy status of the primary part, the LM385LPR-1-2 represents the active production alternative for ongoing procurement and new design implementations.

Frequently Asked Questions (FAQ)

Q: Can the LM385LPR-1-2 directly replace the LM385BPW-1-2 in existing designs?

A: Electrical substitution is valid due to identical voltage output, current ratings, temperature coefficient, and noise performance. However, package differences require PCB layout modification. The LM385BPW-1-2 uses 8-TSSOP Surface Mount packaging, while the LM385LPR-1-2 uses TO-92-3 Through Hole packaging. Circuit board redesign is necessary for physical implementation.

Q: What is the significance of the tolerance difference between ±1% and ±2%?

A: Both devices deliver the same nominal 1.235V output. The tolerance specification defines the maximum deviation from this nominal value across manufacturing and operating conditions. Applications requiring tighter voltage accuracy should account for the ±2% tolerance of the substitute part in circuit calculations.

Q: Are there any compliance or regulatory differences between these parts?

A: Both the LM385BPW-1-2 and LM385LPR-1-2 maintain ROHS3 compliance and REACH unaffected status. No regulatory or compliance barriers exist for substitution.

Q: Why is the LM385BPW-1-2 in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer is discontinuing this specific part number. The LM385LPR-1-2, which remains in Active status, represents the ongoing production alternative for this voltage reference function.

Q: Can these parts be used interchangeably in breadboard or prototype applications?

A: The LM385LPR-1-2 Through Hole package is suitable for breadboard prototyping. The LM385BPW-1-2 Surface Mount package requires soldering to a PCB and is not compatible with standard breadboard layouts.